NMR Structure of the Mg2+-loaded C Terminal Domain of Cardiac Troponin C Bound to the N Terminal Domain of Cardiac Troponin I
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | HSQC | 1mM [13C,15]cTnC(81-161)/cTnI(33-80), 20mM Tris(d11), 10mM DTT, 20mM beta-mercaptoethanol, 2mM EGTA, 100mM KCl, 20mM MgCl2 | 90% H20, 10% D2O | 100 mM CaCl2, 20 mM MgCl2 | 6.8 | ambient | 318.00 | |
| 2 | HNHA, HNHB, CN-NOESY-HSQC | 1mM [13C,15]cTnC(81-161)/cTnI(33-80), 20mM Tris(d11), 10mM DTT, 20mM beta-mercaptoethanol, 2mM EGTA, 100mM KCl, 20mM MgCl2 | 90% H20, 10% D2O | 100 mM CaCl2, 20 mM MgCl2 | 6.8 | ambient | 318.00 | |
| 3 | (HB)CBCA(CO)NH, HNCACB | 1mM [13C,15]cTnC(81-161)/cTnI(33-80), 20mM Tris(d11), 10mM DTT, 20mM beta-mercaptoethanol, 2mM EGTA, 100mM KCl, 20mM MgCl2 | 90% H20, 10% D2O | 100 mM CaCl2, 20 mM MgCl2 | 6.8 | ambient | 318.00 | |
| 4 | H(CCO)NH,C(CO)NH | 1mM [13C,15]cTnC(81-161)/cTnI(33-80), 20mM Tris(d11), 10mM DTT, 20mM beta-mercaptoethanol, 2mM EGTA, 100mM KCl, 20mM MgCl2 | 90% H20, 10% D2O | 100 mM CaCl2, 20 mM MgCl2 | 6.8 | ambient | 318.00 | |
| 5 | (HB)CB(CGCD)HD, (HB)CB(CGCDCE)HE | 1mM [13C,15]cTnC(81-161)/cTnI(33-80), 20mM Tris(d11), 10mM DTT, 20mM beta-mercaptoethanol, 2mM EGTA, 100mM KCl, 20mM MgCl2 | 90% H20, 10% D2O | 100 mM CaCl2, 20 mM MgCl2 | 6.8 | ambient | 318.00 | |
| 6 | NOESY-HSQC, AB-TROSY | 1mM [13C,15]cTnC(81-161)/cTnI(33-80), 20mM Tris(d11), 10mM DTT, 20mM beta-mercaptoethanol, 2mM EGTA, 100mM KCl, 20mM MgCl2 | 90% H20, 10% D2O | 100 mM CaCl2, 20 mM MgCl2 | 6.8 | ambient | 318.00 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | INOVA | 600 |
| 2 | Varian | INOVA | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| DGSA | the structures are based on a total of 958 restraints, 818 are NOE-derived distance restraints, 78 dihedral angle restraints, 4 distance restraints from hydrogen bonds and 58 dipolar coupling restraints | Felix |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 20 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 11 (lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | Best 20 Structures. These structures were determined using triple-resonance NMR spectroscopy on Mg2+-saturated 15N,13C-cTnC(81-161) bound to cTnI(33-80). |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | processing | Felix | 2000 | Accelrys |
| 2 | structure solution | CNS | 1.0 | Brunger |
| 3 | structure solution | CNX | 1.0 | Accelrys |
| 4 | refinement | CNX | 1.0 | Accelrys |
